YouGamers talks about Proper Multicore Gaming.

Core blimey - they're finally all getting used! Cores in a CPU, that is. Yes, at long last, after two years from when the first dual core CPUs (and nearly one year for quad cores) appeared on the market, we've now got games properly using the hardware that many gamers have these days. However, we've noticed on our forums that people are stating that some of the big names, such as the recent Crysis demo, are using all of the cores "fully". Read on to find out the truth behind this and what "fully" using all of the cores actually means.